# PYROSOFT FDS Client vs Optris calculator

The clearest difference is update cadence: Optris calculator at every 2 months against PYROSOFT FDS Client's every 6 months. PYROSOFT FDS Client's advantage is iOS requirement (10.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PYROSOFT FDS Client ships an update every 6 months, Optris calculator every 2 months. The most recent releases landed on November 6, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PYROSOFT FDS Client | Optris calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pyrosoft-fds-client/id1449237226/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 77 MB | 31 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DIAS Infrared GmbH](https://appshunter.io/developer/1449237225) | [Optris GmbH](https://appshunter.io/developer/1619077973) |

## What reviewers say

### PYROSOFT FDS Client

[App page](https://appshunter.io/ios/app/pyrosoft-fds-client/id1449237226)

Access and control PYROVIEW FDS fire detection systems remotely. Receive real-time image data, status updates, and command transmission. Get instant notifications for errors or alarms via push messages or email.

**Highlights:** Remote system access, Image data and status information, Command transmission for remote control, Push message and email notifications, Network connection to PYROSOFT FDS server

**Features:** macOS Compatibility

**In-app purchases:** none


### Optris calculator

[App page](https://appshunter.io/ios/app/optris-calculator/id1619077971)

**In-app purchases:** none


## Frequently asked questions

### Is PYROSOFT FDS Client free?

PYROSOFT FDS Client is free to download, with no in-app purchases.

### Is Optris calculator free?

Optris calculator is free to download, with no in-app purchases.

### Do PYROSOFT FDS Client or Optris calculator have ads?

Neither PYROSOFT FDS Client nor Optris calculator shows ads.

### Which is updated more often, PYROSOFT FDS Client or Optris calculator?

PYROSOFT FDS Client ships an update every 6 months, and Optris calculator every 2 months. Most recently, PYROSOFT FDS Client was updated on November 6, 2026 and Optris calculator on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*